Grinding machine



Oct- 26, 1943- J. F. sTANDlsH E'r AL GRINDING MACHINE Filed Aug. 15,1940 Patented Oct." 26,` 1943 a corporation of `New Jersey v ,A

Appl'catonAuguSt `15, 194i),r Serial NQ'ISSZQGM .i 9 claim,` (01.51-100)This application relates vto "grinding machines and more particularly'to a `grinding lmachine of the type disclosed in Letters Patent` of theUnited States 850,098 "granted March 22,V t1932, on an application ofA.` 33. Fowler.l `Machines' of `this type are adapted to bje used ior,'grindingthe cutting fiolades of rotary 'cutters such as are 'used 'inheelhtrimming"operations,' l e in View of the'` variety. "ofA shapesvand sizes` of heels lernployedin the manufacture of shoes,` a

large number Iof difrerentltypes of cutters are einplovedtthe ,profilesor which may be' formed ffor'exarn'ple `as an arc of fa circle or as acom-l pound or ogeje curve for operatingon Louis heels. The machineillustrated in'` the Fowlery patent employs a template orgui'dngthecutter? past v the grinding wheelljllso that the Aouderwill' be Y groundwith the desirefdfprole. In this type' di machine a different templatemust be inserted in the machine or each size'and shapeof cutter and itisV obvious that the mimber of templates required with the machinemairbe very high;

`Cut-'ters u'sed ingheelhtr'immingf machines "are usuallymadeinfsever'al sizes nor widths for 'each style of cutter; For example,if theeuttin'gf" edge is formed as tnel'arc of a circ' several `blades,may` be 'provided having difiere same radius of-"curvattjne of thecutting edge'. one offthe olojectsfo this irnrentiin1-is to prof vide amachine for tiie'typ illustrated bythe Fowler .patent inwhichitlietemplate whichr` con-z trols the movementof the cutterpast the'igrinding wheel is mounted for adjustment :insuclia manner` that thesamertemplate maybe em*- ployedfor grinding cuttersfof'rdiferent Widthshaving similar proles; Q-ff r In accordance witha feature ofAtheinventicn the template is mounted` for lengthwise-move'- mentrelative tothe-carriage by which the cutter is supported so that theposition of the template relative to the carriage may `loeadiusted inac;- cord-ance with the widthofA the cutter :carried thereby; Thisladjustment compensates for 3the shift in the-position of the center ofcurvature ofr the cutting bladesrelative-,to the supporting member ascutters of different `Widths are placed in the machine. Anotheradjustment is provided for the template to insure that the correct.angular relationship will exist btvv'eenthe template andthe carriage asthe .template is shifted be` groundis'ccntrlledrelativetothe Vgrindtemplate lfor use` with a plurality of different sized cutters lreddcesthejnumber of templates' required to the number voi different styles ofcutters whichl are Vto bejfgroundand eliminates thenecessityl ofintroducing la dii'erentwtemplate` for each size of cutter'ofy kany onestyle fTheseand other` objects of' the invention Vwill no'wbe wdescribedin detail",v reference'beirig had to the drawing,

Fig. `1 is" a` perspectiveview of a Vportion of a grindingmachine-illustrating one fiordi [o 'f iIieclranism bywhichte'inoveinehtof thecutter'to Wheel; v v y Fig; 2 isa ver`f"ca1 Sectiothroug'hmthe support l It provided with'ahorizontallyfextendngldovatailgroove `:for Isupporting the? dovetaibportion I6 of a slide memberi3. ^A screw 20i's provided for adjusting the slideill horizontally' ina direc! tion. perpendicular@ toil thewaxis of -thegrinding lengthwiserelative tl'ieretcn Provision is made for readily determining the.proper adjustment ,of the template inihemachine for thevpartiouiarsizeof @attento be operatodgupon.: vThese adjustments of fthe template,adapting a single wheel l El,` the Ascrevv being, threadedinto Atheslide and held againstaxialarnovementirelative to' the trame in anysuitable `manners Carried :by the slide i8 for,V `verticaladjustment isasupportv 2-2', the position i of g, the A: support, relative l to ,fthe`slide being determined by zascrew24 .the lovverr end of which isarranged `tohrest enligne upper surface of the'slide. A screw 26threaded into theQjslide .I8 and passing through aislot. 28 inthensupport 2 2 -loclts the supportto the slide in the desiredverticalpositom,.Itwill y'thus be seen that the support 22.lsrvert'ically adjustablerrelative to the frame andsince itis vrriountedon thefslide ,i8 itlmafv also be adjusted horizontallyfwithrespect totheframe-l2 and thegrinding Wheel I0.

fA shaftlen extending parano; to the'axis of the grindingV` `WheellIllissecured in 'an arm` 3i ex'- t'ending forwardly `from the support22,` this shaft 'forming means by which-a cutter head 32 may besupported forfmoVementaXia1lyfof Vthe grind# ing Wheel l0 fasWellwasgiorfrocking movement vtoward and away-therefrom, The cutter head32 isrigidlyfheld in a carriage vtllftvhich islournaledon the shaft V3i]andA arrangedto slide relaytivethereto, the cutterk head being mounteding die. 'carnage baow the, shaft", so. `A handige@ be grasped by theoperator to impart the desired movements to the carriage relative to thegrinding wheel.

In order to control the rocking movements of the carriage 34 as it isslid along the shaft 30 so that the cutter supported by the'carriagewill 2,332,675 v and arranged to be firmly secured to the slicle A beground with the desired prolega template is secured to the carriage andis arranged to extending laterally fromthexhorizontal .fpor- A screw 54extends through tion of a bracket 52. e a slot 56 concentric with theaxis of the pin 46 and is threaded into the template support 44 forsecuring the template support in the vdesired posi.-

byanut |00. l y l Y. The adjustment ofthe templatelengthwise of thecarriage 34 is for the purpose of accommodating a single template forgrinding the` edges` t of a plurality of similar cutters .of varyingwidths. It is the usual'practiceftoj'provideA a series of cutters! ofthe same type, -such'as .theicutter |02. illustrated in Fig. 1 havingythe same radius of curvature but different widths, and as long Vas .theradius of curvature of various cutters is the samev a'single templatehaving the proper profile maybe utilized in this machine. The center oftion of adjustment relative to the bracket 52.-'"`

The template support 44 carries adjacent to one end ythereof avertically extending pin'l (Fig.v 2) and a recess lilyv is formed in theWall of the template support near therbottom thereof for the reception.of one end of the template which has a semi-circular recess forembracing the adjacent portion of the'jpin 60. `The-other end ofthetemplate, is apertured to receive Va pin 6,2 mounted on a latch 64pivoted at 65 in the template support and the latch is biased by aspring 66 to cause thepin 62 to; engage Vthe aperture -in the `template38 so as to holdvthe template rigidly curvature of theycutters relativeto the carriage 34varies'fin accordance with the widths of the `1"cutters insertedlinthe machine, and therefore, v the center Vofcurvature of the template must be correspondingly shifted'so that itsposition relative to rthe roll 40 will correspond to the center ofcurvature of thecutter to be ground` As noted inFig. 1 the cutter. |02is'm'aintain'ed betweenva pair of ,clamping collars |04 which are`rmounted y on a shaft '106, the cutter/head 'assembly/being'Asecuredtothecarriage 3 4 by a nutV |08 threaded in a predeterminedposition relativeto the sup- 1 port 44.

The template support 44 is mounted onthe carriage 34 for adjustmentlengthwise thereof for a purpose to-'be hereinafter explained. For thispurpose the bracket 52, to which the template support 441s secured,extendsupwardly from a slide 10 having ra `dovetail groove forengagement with a dovetail .portion 12 formed in the upper rearwardportion of the carriage '34 and extend` ing'parallel tothe shaft 30. Theslide'm is arranged -to be moved,v relative `to the carriage 34 by alcam14 provided with a circumferential cam groove within whichis received acam follower 16 mounted on thex'slide 10. The cam 14 isrotatablykmounted in a bracketv extending `upwardly from a' slide 82 received ina slideway 84 formed in the rearvertical Wall of the carriage 34. l Asthe cam/is vrotatedpthe template 'supporting slide 10' ismovedrel'ativelto kthe slide 82"thus causing movement of the templatesupport lengthwise of the carriage Y34 provided the slide'82 by Iwhichthe cam 'I4 Ais supportedfis rigidly secured tothe carriage. v

Thel slide 82 is rigidly securedin the'slideway 84 in either koftwojpositions by a' latch 86 (Fig. v3) 'P VQted at 88 to a depending andforwardly extending portion of the slide. A spring 'acts v on the latchsato urge the Alatch upwardly into engagementlwith the adjacent surfaceofthe slidewaywhich is provided with spaced*` recesses 92 to receive thelatch-Wherebythe slide maybe locked in either of two positions.Bydepressing the latch 86; thus moving" it out ofaengage'ment with.. theadjacent recess, the slide Z02 is free to move relative'to-the' carriage34 thus permitting movement of the cam 'Mirthe slide `lll andthe '70template 38'relativeto the carriage forapurpose to'be described; Theslide '10 on which the template is mounted is arranged tovbe locked tovthe v euttsrssplthatthe position A0f. the. Qam-.fo.rf,any

bracket 80 by a screw 94 having a head96 under l.

4lying a slot 98 in the upper surface of the" slide onto. a hollowexternally threaded boss' (not Shown)` on thecarriag'egflt will thusb'eseen the right-hand clamping'collar:|,04`will always be in the samepositionv relative tothe. carriagere- 'garmess 'ofthe widtnlof thec'tterheid between ,theA clampingleollara and'ifv a Acutter head Aprov videdwith' cutters'.widerthan that illustratedbut having the, same vradius oflcurvature is' inserted in the machin'eQ-the .center vorf .curvature ofthe f cutterwill yloeshifted.to-'thevleitlf ,"I'hefcarn 14 by which theposition' ofthe 'teirfiplatjelss relativen@ thecarriagefll is shifted oilsvlpllovided indicia andthe. bracket 80 supporting' the cam has an'index line-opposite whichy the indiciaon theA earn may beplaced todetermine the proper vsetting of the cam for theparticularjcutter whichis to be grounda "Chartsmwbe mede fer each ,Set 0r cutter o f anysetmaybe yreadily ascertained.

It may also be necessary to j,adjust thetemplate A angularly-.frelativeto the. support 3 4 aboutthe axis` of the pivotpin 46a particularlywhenthe machine isused forkgrinding heel trimming cut'-y ters, tomaintain theysymmetrcal relationship betweenjtheA template and theroll-40 andfto compensate .f xfor;v any l shifting-.fof the*l center ofcurvature normal to the; .cuttingv edge; This reelationship:`will-beupset when the templateis shifted relative .tothe'carrlage 34 andlprovision is made for determining the properangularad-l justment of the template relativetd the supporti Caliperjaws ||"0` and ||2 are mountedn an'arm |-|4secured tothe arm 3|,--theljaw llbing ad; ju'stablerelative to the arm` and the jaw I2 beingxed'relative thereto;l Before insertingv the cutter head in the machine,itis presented to the caliper jaws,` the position of the jaw ||0 beingadjusted so that the jaws' measure the distance between the clampingcollars |04 ofthe cutterv head, the

jaw H0 'then being`- secured' in position'bya screwfl 6. The, caliperjaws are formed at'the opposite side of the vsupportingarmv H4 withrounded V'gage' members]I8andY |2'l'l,` and the distance between thesemembers will depend upon the'Width 'of the cutter which visto heground.VAlfter the position of the template lengthwise of .the carriage 34 hasbeen determined bythe ad@ l. justment of'thevcamM,thefan'gular'adjustment. of. the ytemplatefis made@'With'ftheQcarriagefM moved to the' right, the'latch 861s pressed" down.positionr of the Ariagc'ilt 2l382625 ,by thefpioperatortoi permitmevementxoirthe slide 8-2, carryingthe bracket l) vvhiclrissecuredby thescrew Qz tothe template. tllpportimg slide; T: The

slide: 8:2: is now moved tu untilthelatoh 815: engages;y the recess 32:.at. trielriight end tof: .the

carriage whereupcn thelatch releasedl and snapped into 'lockingpcsitiprrby thespring SCL The screw et? which loeks they templatesupport t4; .tothe: brackety 521v is; new` loosened and the template.is-'moved about the axis.. .otthez pin. 4'6

until the. template engages both. ot the. gage members Ilf and will. itapparentth-at some movement of the carriageA M lengthwise of the` shaftmayr be necessaryiat. this. time.` to ena-bleboth or the. gage membersto be;` engaged `bythe tem-plata After.: the proper angularV 'position`civ the template relativej to the carriage; `34 has been` obtained.,`the template support". Mr) is Vagain locked in placerby thel screvc 54.Y

vAlfter this adjustment of the. template hasibeen made, the. templatewild beinithegproper position relative -to the carriage; sc that,inscooperation with.` theroll lll), the/.proper-rocking ymovement ottheY carriage 34o abontthefshaft' 3l) will `be obtained during;Vtheisliding movement' of the car riagef relative to. the: shaft sothatzthe cutter `will yboe-,.inoved past the` grinder-inthe properypath.

It should` be understood thatithestype.- of' cutter head illustratedandar-rangedtd bev used in a heelftrimming; mach-ine is;novidefil` witha pair of cutters spaced 180 apart asililustrated 'more clearly inLetters;.Patent of the United States `11,753,855 `granted Arpril,V193Clgion. an application formed ascompound curvesgas for example an iagee curve-,L'for' operation Ton Louis heels are formed in sets ofdifferent sizes with `the central portions of the various cutters of anyone set having the same curvature. Accordingly, a suitably shapedtemplate may be employed in the machine for grinding any cutter of a setregardless of the size of the cutter, the same adjustments being madefor various widths as is required for the cutter illustrated.

It will be apparent that the adjustments which cutter carriage monritedtor sliding movementfin l aapath parallel tov the' axis-'offtheiabrading ele- -mentzand'foroscillating movement toward' and awayfromthe. abradingelement, a- `template car#- Vrieti'by'said?cuttercarriage; arol'l arranged. to be engaged by said template during` thesliding move.- mentot said carriage, means enabling adjustment ioiA thelateralfpositionuof one en d of said-template relative tothe'otherendthereof' tolvary thel angular: 'relationship betweeirthe.`template `and said workV support, and means` engageable withtheroIl-'engaging surface-offf'said template at spacedpointsfordetermining and.- controlling the desired tangular relationship betweenthetemplate.` andE theiworlrsllpport. i

o. 2.; In; a machine. for grinding. cutters shaving curved cutting`edges; an abrading elementya cutter carriage. :mounted forwslidingmovement in a pathparail'el tothe. axis` of 'the'abrading-element, andforoscillatingmovement toward `and away from the. abrading element,altemplate cariried byl saidicutter: carriage aroll arranged to beengagedinbylv vsaid template duringv the sliding movement of saidcarriage, kmeansior` adjusting *the rtemplate `lengthwiseloi saidcarriage, calipers; carried by"'sai'dmachine-V and arranged to'be spacedin accordance with the width of the mittlere"carried by the carriage,and means on said calipersarrangedto be engaged by said `template to.determinerthe properv angular position thereof corresponding .tofthewidth of the cutter t'obe ground.v

BerlinY a machine 'for `grinding cutters having Acurved cutting.ed`ges,"an abrading element, a cutter carriage?. mountedfor slidingmovement in afpathparallel tothe raxis of the abrading element fand? for.oscillating movement toward and faway'from lthe abrading element,a-template carried by said cutter carriage, a roll'farranged-to beengaged icy-said: template during the'l sliding movement of'saidcarriaga means for adjusting :the templatelengthwisegof. Ls'aid'carriage means foradjusting the `angular'p"o'siti'on of said templaterelativeto: said carriage, "calipers carried by said: machine "andarranged to Vbe spaced inacoordance with the "width-Vofvthe cutter to beground, and gages carried by said calipers and arranged to be engaged bysaid template to demay be made on this machine will reduce the number oftemplates required to the number of different types of cuttersregardless of thenumber of sizes of cutters of each type to be ground.This reduction in the number of templates required to be stocked withthe machine thus decreases the cost of the equipment while notmaterially affecting the skill required to operate the machine since theadjustments required are simple and may be quickly mada It will also beapparent that the invention is not restricted to the grinding of cuttersused in heel-trimming machines, this type of cutter being shown merelyfor purposes of illustration.

Having thus described our invention, whatwe claim as new and desire tosecure by Letters Patent of the United States is:

l. ln a machine for grinding cutters having curved cutting edges, anabrading element, a

termine the proper angular relationship thereof relative to saidcarriage.

4. In a machine for grinding cutters having curved cutting edges, anabrading element, a cutter carriage mounted for sliding movement in apath parallel to the axis of the abrading element `and for oscillatingmovement-toward and away from the abrading element, a template, asupport therefor pivoted at one end to said cutter carriage about anaxis perpendicular to the template, means locking the other end of thesupport in a desired position of adjustment relative to said cuttercarriage, a pair of calipers arranged to be spaced in accordance withthe width of the cutter to be ground, and means carried by said calipersarranged to be engaged by said template to determine the desiredposition of adjustment thereof.

5. In a machine for grinding cutters having `curved cutting edges, anabrading element, a

. awayfrom the abrading element, a template, a

slide mounted on said carriage, means adjustably securing said templateto said slide, means carried by the carriage for adjusting theslidethereon, means adjustably locking said slide and said adjusting meansasa u nit in either one of two `positions on said carriage, one of saidpositions being the grinding position, and means engage- 2,332,675 .y il Icurved cutting edges, a cutter carriage mounted* -forsliding'movement in avpath parallel tof-the axis of the abradingelementand for oscillating axis of the abrading element and forkoscillating movement toward and away from the'abrading element, arotatable cam provided with a cam groove, said cam being mountedl onsaid cutter carriage, a slide carried by said carriage, a tem- .platecarried by said slide, a roll arranged to be engaged by said templateupon sliding movement of said carriage, anda cam follower carried by-said slide and arranged to engage the groove in lsaid, cam wherebyrotative movementof said cam adjusts said-slide and said, templaterelative to saidcarriage.-

7; In a machine for grinding cutters having4 `curved cutting edges, acutter carriage mounted for sliding movement in a -path parallel :to the`axis ofthe abrading element and for oscillating movement toward andaway from the abrading element, a rotatable cam provided witha camfgroove, a support for said cam, means for locking said support ineither of two positions on said cutter carriage lengthwise thereof, aslide carried by said carriage, said'slide having a camz-followerengaged by the grove in said cam whereby rotative movement of said camdetermines the lengthwise position of saidslide relative vto saidcarriage, a template carried by said slide, said template being mountedfor angular adjustment relative to said slide, and means cooperatingwith said template when said cam support is inone of its positions fordetermining the proper position .of said templatetrelative tosaid'slide, and a roll arranged to be engaged by said Vtemplate whenvsaid cam support is in the other of its positions.

8. In a machine for grinding cutters having movement towardand away fromthe abrading element; a rotatable'cam provided with acam groove, asupport for said. cam, means for locking said" support in either of twopositions onsaidcutter carriage lengthwise thereof, a slide "carried bysaid carriage, rsaid slide having a cam follower engaged bythe lgroovein said ca'm.

wherebyA rotative movement of said cam determines the lengthwiseposition of saidl slide rela'- tive to said carriage, a template carriedby 'said slidefsaid template being mounted for angularvadjustmentrelative to said slide, means 'cooperatingy with saidtemplate'when vsaid cam support is in one of its positions fordeterminingthe proper position of said template relative to said slide,said means comprising a pair of abutments arrangedto be spaced in'accordance with the width of the cutter'to be ground and to beengagedbythe template when in its v,proper position of angular adjustment, anda froll arranged-'to be engaged by' said templatev vport is in the otherof its positions; i'

9. In a machine for grinding cutters having ,curved i cutting edges," acutter carriage mounted for sliding movement in av path parallel to theaxis of the abrading element and for` voscillating 'movement towardand'awayC from' the abrading y element, a rotatable cam providedv withacain groove, said cam beingmountedon said cutter carriage, a slidecarried bysaid-'carriage a template carried by said slide, a rollarranged to be l i engaged by said template upon sliding movementv ofsaid carriage, acamfollower carriedby'said slide and arranged to engagethe groove in said cam whereby rotative movement of said cam adjustssaid slide and'said templaterelative to said carriage, said cam anditssupporting means being provided with'cooperating indicia for 'in'-dicating the proper setting of the slide carryingr` y *y vthe -templatein accordance with the width oi the cutter to be ground. n

JOHN F. STANDISH.

IlEIS'lIili,y S. MACDONALD.

,hen said cam su'pf-

